<!--这个是父模板-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{% block title %}{% endblock %}--小饭桌</title>
    {% block head %}{% endblock %}
</head>
<body>
<header>
    <ul>
        <li><a href="/">首页</a></li>
        <li><a href="/course">创业课堂</a></li>
    </ul>
</header>
{% block body %}我是来自父模板的{% endblock %}
<footer>1234@1235545</footer>
</body>
</html>